In the book The War of 1812: A History from Beginning to End by Henry Freeman, what was the main idea, and what are some supporting details of the main idea?

The main idea of The War of 1812: A History from Beginning to End is that the War of 1812 had its roots in conflicts that went back to the previous century and that it was a far-reaching conflict. For example, in Chapter 1, Freeman discusses how the roots of the war went back to the Seven Years' War, which began in 1754, and which involved many major European powers. The War of 1812 itself also involved the interplay between great world powers. For example, Great Britain was still embroiled in fighting the French during the War of 1812, and the interest of the British in the war grew when they had finally stopped fighting the French and turned their attention to attacking New Orleans (which the author discusses in Chapter 9). (The war had actually ended before Andrew Jackson's great victory in New Orleans, but news of the war's end, negotiated in Belgium, had not yet reached the American or British troops in the New World.) The war had far-reaching effects on Great Britain, Canada, and the U.S. The U.S. finally established its independence from Britain, and the border between Canada and the United States was established.